package com.example.luckysystem.common.util;

import com.fasterxml.jackson.core.JacksonException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.json.JsonParseException;

import java.util.List;
import java.util.concurrent.Callable;

/**
 * @version 1.0
 * @Author shangjialu
 * @Date 2024/12/7 18:45
 * @注释
 */
public class JacksonUtil {

    private JacksonUtil(){

    }

    //对objectmapper进行单例化
    private final static ObjectMapper OBJECT_MAPPER;

    static {
        OBJECT_MAPPER = new ObjectMapper();
    }
    private static ObjectMapper getObjectMapper(){
        return OBJECT_MAPPER;
    }

    private static <T > T tryParse(Callable<T> parser){
        return tryParse(parser, JacksonException.class);
    }

    private static <T > T tryParse(Callable<T> parser, Class<? extends Exception> check){
        try {
            return parser.call();
        } catch (Exception ex) {
            if (check.isAssignableFrom(ex.getClass())) {
                throw new JsonParseException(ex);
            }
            throw new IllegalStateException(ex);
        }
    }

    //序列化方法
    public static String writeValueAsString(Object object){
        return JacksonUtil.tryParse( () -> {
            return JacksonUtil.getObjectMapper().writeValueAsString(object);
        });
    }

    //反序列化
    public static <T> T readValue(String content,Class<T> valueType){
        return JacksonUtil.tryParse(() -> {
            return JacksonUtil.getObjectMapper().readValue(content,valueType);
        });
    }

    public static <T> T readListValue(String content,Class<?> paramClasses){
        JavaType javaType = JacksonUtil.getObjectMapper().getTypeFactory().
                constructParametricType(List.class, paramClasses);
        return JacksonUtil.tryParse(() -> {
            return JacksonUtil.getObjectMapper().readValue(content,javaType);
        });
    }
}

